13191691555 has 24 divisors (see below), whose sum is σ = 18524848608. Its totient is φ = 8991537408.

The previous prime is 13191691531. The next prime is 13191691619. The reversal of 13191691555 is 55519619131.

It is a de Polignac number, because none of the positive numbers 2^k-13191691555 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120294 + ... + 202123.

It is an arithmetic number, because the mean of its divisors is an integer number (771868692).

Almost surely, 2^13191691555 is an apocalyptic number.

13191691555 is a deficient number, since it is larger than the sum of its proper divisors (5333157053).

13191691555 is a wasteful number, since it uses less digits than its factorization.

13191691555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322603 (or 322596 counting only the distinct ones).

The product of its digits is 182250, while the sum is 46.

The spelling of 13191691555 in words is "thirteen billion, one hundred ninety-one million, six hundred ninety-one thousand, five hundred fifty-five".